Bookuh guk is a dried codfish soup which is one of the best ailments known to cure hangovers in Korea. It's a very simple mild-soup dish containing battered egg mix, green onions and tofu. Some prefer to include bean sprouts which can add another refreshing layer to its broth to make bookuh kongnamul guk. Red chili pepper flakes (gochugaru) can also be sprinkled onto the final stock to add an extra flavor and kick.